12 June 2015 - robert has released a new Prince of Persia 1 for SNES mod, called The Castle of War. Its forum thread, including a download link, is here. Also available via popot.org here. Good luck and have fun!

Also, Ipank7000 has released a Prince of Persia 1 for DOS mod, called Ipank's Levels. Its forum thread, including a download link, is here. Also available via popot.org here, and via Total Pack. Again, good luck and have fun!